Quick Questions explains how cold winter air triggers the same processes that form clouds, fog, and dew so you can see your breath!

Birds fly, and fish swim. We learn this when we are children. But not everything in nature is quite so simple… Meet Limacina helicina, an artic-dwelling sea butterfly that flies through the water.

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Quantum tunneling happens when a particle seemingly teleports across a barrier. But despite how instantaneous this event sounds, recent research suggests that it doesn’t happen nearly as fast as you might think.

Researchers have noticed a decline in reading ability starting in your 40s. And learning more about why this happens might help us tell the difference between healthy aging and Alzheimer’s disease.

In part 2 of our History of the Internet series, Hank explains how public access became declared a human right!

Stay informed. Stay cautious, but not scared. Listen to scientists and public health officials and follow their guidance. By protecting yourself, you’re protecting the most vulnerable among us. Together we can flatten the curve on...

Bad tidings - the tides are slowing down the earth!

You might feel like your thinking has been getting a bit slower and foggier as you get older, and that eventually happens to everybody. But how can we keep our minds young?

Paul Andersen explains how epinephrine is responsible for changes in chemistry of our body associated with the fight or flight response. Epinephrine released by the adrenal medulla are received by a number of organs associated with the...

In this video Paul Andersen explains how nuclear energy is released during fission of radioactive uranium. Light water reactors, nuclear waste, and nuclear accidents are also discussed along with the future of nuclear energy.

In this video Paul Andersen describes motion as the movement of an object over time. Displacement, velocity and acceleration are all defined. An experiment in motion is used to calculate velocity and acceleration of a tennis ball.

Taking that internship in a remote mountain lab might not have been the best idea. Pulling that lever with the skull symbol just to see what it did probably wasn't so smart either. But now is not the time for regrets because you need to...

Paul Andersen introduces the concept of ethology and contrasts kinesis and taxis. He explains the importance of courtship rituals in fruit flies. He finally shows you how to use a choice chamber to study behavior in pill bugs.

Mountains are some of the biggest things in the world, but today, we're going to teach you how to make some of your own, right on your kitchen table!

The Triassic was full of creatures that look a lot like other, more modern species, even though they're not closely related at all. The reason for this has to do with how evolution works and with the timing of the Triassic itself: when...

Jessi and Squeaks are at the fair, and Jessi is excited to go on the roller coaster! But before they get on, Squeaks wants to know how roller coasters work.

How does light speed up after leaving glass or water? What do light and the President of the United States have in common?

Forces are pushes or pulls on an object. Forces can be determined by measuring the motion of an object. If an object accelerates then a force is present.

Slime molds look gross and... not smart, but they definitely seem to communicate and plan even without neurons. Michael explains the science behind these clever eukaryotes.

What exactly will happen when the sun dies?

In this video Paul Andersen explains why the slowest elementary step in a chemical reaction is the rate-limiting step. This step can be used to determine the overall rate law of the chemical reaction.

Certain moments in our lives seem to last forever. Whether it is a first kiss or a car crash, time can seem to stretchor even stop. Aaron Sitze explains how this sensation is conveyed in cinema and how the same conventions can be used to...

Implement RAID for data redundancy and performance, understanding its configurations and benefits.

Coldham’s Common